Improvement in jelly-glasses



UNITED STATEs PATENT FFICE.

WILLIAM M. KIRCHNER, OF PITTSBURG, PENNSYLVANIA.

IMPROVEMENT IN JELLY-GLASSES.

Specification forming part of Letters Patent No. 129,037, dated July 16,1872.

SPECIFICATION.

To all whom it may concern:

Be it known that I, WILLIAM M. KIRCHNER, of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in J elly-Glasses 5 and I do hereby declare the following tobe a full, clear, and exact description thereof, reference being had tothe accompanying drawing forming part of this specification, which is asectional view of my improved jelly-glass and cap.

My invention consists in the construction of a pressed jelly-glass,internally threaded, and finless so far as the screw-threads extend, andsuitable for use, with a glass cap having a downward,externally-threaded, iinless ange. A iinless gasket-seat is made on thecap above the threaded ange, to extend out over the edge of the glass.

To enable others skilled in the art to make and use my invention, I willdescribe its construction.

The bowl a is made by placing the molten glass in a drop-mold of theproper shape, which is attached -to .the upper end of a verticallymovingstandard, which is operated by means of a lever up against a core orplug threaded at its base, which enters the mold, and against which theglass is pressed into shape. The threaded core or plug is so secured ina threaded box 'as to allow of its being retired or withdrawn from themold by unscrewing. In the operation of pressing the glass forms aroundthe threaded base of the plug and forms a screw-thread, b, around theinside of the mouth of the jellyglass a. The core is then unscrewed fromout the mold, and theglass is complete and ready to be removed andfinished in the usual manner.

The press just described for forming the jelly-glass forms thesubject-matter for a separate specification.

The cap cis made in the same way, by placing or screwing in the mouth ofthe mold an annular ring having a shoulder for formingv the overlappinggasket-seat a, and the inner face of the shoulder threaded for formingthe screwthread around the outside of the downwardprojecting iiange e.The mold is operated in the manner described,l up against a smooth plug,which enters and presses the glass into shape; or the mold may bestationary, and the plunger descend therein in the usual manner.

The screw-thread i is formed around the ou tside of the ange e by theglass pressing in around the thread on the ring, after which the ring isunserewed from the mouth of the mold and the pressed cap is removed.

Thus I am able to make a pressed jelly-glass internallythreaded, inlessnot only in the bowl but across the screw-thread, which heretofore hasnot been accomplished in pressed articles of glass; and also apressed-glass cap suitable for use therewith, having adownwardly-extending, threaded, Euless flange, e, and alaterally-extending tinless gasket-seat, o.

In using my jelly-glass I iind it is better to put a gasket of paper orother like material upon the gasket-seat o, since it prevents the glasscap from becoming set on the mouth of the bowl. When this happens thecap is often very hard to remove, as is frequently illustrated in thecase of glass Stoppers in bottles.

What' I claim as my invention, and desire to secure by Letters Patent,is,-

A inless pressed jelly-glass, composed of the bowl a, and cap c, withscrew-threads and gasket-seat, substantially as described.

In testimony whereof I,the said WILLIAM M. KIRCHNER, have hereunto setmy hand.

WILLIAM M. KIRCHNER.

Witnesses:

W. N.- HOWARD, JAMES I. KAY.

